For the 30th May 2021 Edition, we monitored 93 European funding calls resumed in single Synopses. This week we talk about the call for funding networks issued by the European Cooperation Organisation for Science and Technology (COST), an entity funded by the European Commission since 1973. It is a call that supports networks of researchers and scientists through covering theirs expenses for seminars, meetings and exchanges of best practices in single Actions with a duration of 4 years. We also resumed all the funding calls issued from European Innovation Council on new Open Transition Challenges. Europeaid published 3 new calls supporting developing countries.